Humidifier and/or flow generator for CPAP device

• US 10,124,143 B2
• Filed: 04/15/2015
• Issued: 11/13/2018
• Est. Priority Date: 08/15/2005
• Status: Active Grant

• Current Assignee: ResMed Pty Ltd. (ResMed Incorporated)
• Original Assignee: Resmed Limited (ResMed Incorporated)
• Inventors: Smith, Ian Malcolm, Snow, John Michael, Lithgow, Perry David, Kao, Dan
• Primary Examiner(s): Dixon, Annette
• Application Number:
  US14/687,223
• Publication Number:
  US 20150231358A1
• Time in Patent Office: 1,308 Days
• Field of Search: 12820013, 12820014, 12820021, 12820024, 12820213, 12820227, 12820312, 12820316, 12820317, 12820325, 12820326, 12820327, 12820413, 12820414, 12820417, 12820418, 12820421, 12820422, 12820423, 12820512, 12820513, 12820524, 12820615, 12820617, 12820621, 12820714, 12820718, 128911, 128912
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: A61M 16/0075 Bellows-type
• CPC Class Codes: A61M 16/0616 with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure
• CPC Class Codes: A61M 16/0666 Nasal cannulas or tubing devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02
• CPC Class Codes: A61M 16/08 Bellows; Connecting tubes having means for taking samples G01N1/22; Water traps; Patient circuits
• CPC Class Codes: A61M 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/0875 Connecting tubes
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 16/1075 by influencing the temperature A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/109 the humidifying liquid or the beneficial agent
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 2205/02 characterised by a particular materials
• CPC Class Codes: A61M 2205/21 insensitive to tilting or inclination, e.g. spill-over prevention
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/42 Reducing noise
• CPC Class Codes: A61M 2209/086 Docking stations
• CPC Class Codes: B01D 47/02 by passing the gas or air or vapour over or through a liquid bath

Abstract

A CPAP device includes a flow generator comprising a motorized fan with an outlet. The motorized fan is configured to pressurize a supply of gas. The flow generator further comprises a flow generator outlet in communication with and offset from the motorized fan outlet and comprises a connector configured to receive the pressurized supply of gas from the flow generator, the connector being in communication with the flow generator outlet and positioned downstream of the motorized fan outlet. The connector comprises an attaching portion at a first end, the attaching portion configured to be coupled to the flow generator. The connector also comprises a flexible sealing portion at a second end opposite the first end, the flexible sealing portion comprising a bellows-type conforming face seal that is axially and/or laterally flexible. In addition the connector comprises a channel provided between the attaching portion and the flexible sealing portion for delivering the pressurized supply of gas from the first end of the connector to the second end of the connector.

Claims

1. A flow generator for a CPAP device comprising:

a motorized fan with an outlet, the motorized fan being configured to pressurize a supply of gas;

a flow generator outlet in communication with and offset from the motorized fan outlet, the offset being configured to impeded the flow of any water that has entered the flow generator through the flow generator outlet toward the motorized fan; and

a connector configured to receive the pressurized supply of gas from the flow generator, the connector being in communication with the flow generator outlet and positioned downstream of the motorized fan outlet, the connector comprising;

an attaching portion at a first end, the attaching portion configured to be coupled to the flow generator;

a flexible sealing portion at a second end opposite the first end, the flexible sealing portion comprising a bellows-type conforming face seal that is axially and/or laterally flexible; and

a channel provided between the attaching portion and the flexible sealing portion for delivering the pressurized supply of gas from the first end of the connector to the second end of the connector.

2. The flow generator of claim 1, further comprising a chamber provided with sound insulating materials, the chamber being in communication with the motorized fan outlet and the flow generator outlet and being positioned downstream of the motorized fan outlet.

3. The flow generator of claim 2, wherein a lower portion of the chamber is positioned below both the flow generator outlet and the motorized fan outlet when the flow generator is in an upright orientation.

4. The flow generator of claim 1, wherein the connector is comprised of silicone or silicone-like material.

5. The flow generator of claim 1, wherein the connector has a one-piece construction.

6. The flow generator of claim 1, wherein the connector is removably attached to the flow generator.

7. The flow generator of claim 1, wherein the attaching portion is cylindrical.

8. The flow generator of claim 1, wherein the bellows-type conforming face seal has a gradually curved cross-section profile.

9. The flow generator of claim 1, further comprising a chamber provided with sound insulating materials, the chamber being in communication with the motorized fan outlet and the flow generator outlet and being positioned downstream of the motorized fan outlet,

wherein a lower portion of the chamber is positioned below both the flow generator outlet and the motorized fan outlet when the flow generator is in an upright orientation,

wherein the connector is comprised of silicone or silicone-like material,

wherein the connector has a one-piece construction,

wherein the connector is removably attached to the flow generator

wherein the attaching portion is cylindrical, and

wherein the bellows-type conforming face seal has a gradually curved cross-section profile.

10. The flow generator of claim 1, wherein the flexible sealing portion is configured to form a seal with a surface that remains outside of the channel by moving the entirety of the connector toward the surface or moving the surface toward the flexible sealing portion.

11. The flow generator of claim 1, wherein the flow generator outlet and the motorized fan outlet are axially misaligned.

12. A CPAP device comprising:

a flow generator according to claim 1; and

a humidifier positioned to receive the pressurized supply of gas from the flow generator.

13. The CPAP device of claim 12, wherein

the connector provides a flow path between the flow generator outlet and an inlet of the humidifier.

14. The CPAP device of claim 12, wherein an aperture in the bellows-type conforming face seal has a larger diameter than an inlet of the humidifier to accommodate tolerances and/or misalignment between the flow generator and the humidifier.

15. The CPAP device of claim 12, wherein the bellows-type conforming face seal is configured to abut a surface of the humidifier surrounding an inlet of the humidifier.

16. The CPAP device of claim 12, wherein the connector provides a flow path between the flow generator outlet and an inlet of the humidifier,

wherein an aperture in the bellows-type conforming face seal has a larger diameter than the humidifier inlet to accommodate tolerances and/or misalignment between the flow generator and the humidifier, and

wherein the bellows-type conforming face seal is configured to abut a surface of the humidifier surrounding the humidifier inlet.

17. A flow generator for a CPAP device comprising:

a motorized fan with an outlet, the motorized fan being configured to pressurize a supply of gas;

a flow generator outlet in communication with the motorized fan outlet; and

a connector configured to convey the pressurized supply of gas from the flow generator to another component of the CPAP device, the connector being in communication with the flow generator outlet and positioned downstream of the motorized fan outlet so that the connector and the motorized fan outlet are axially misaligned to impede the flow of any water that has entered the flow generator through the flow generator outlet toward the motorized fan, the connector comprising;

an attaching portion at a first end, the attaching portion configured to be coupled to the flow generator;

a flexible sealing portion at a second end opposite the first end, the flexible sealing portion comprising a bellows-type conforming face seal that is axially and/or laterally flexible; and

a channel provided between the attaching portion and the flexible sealing portion for delivering the pressurized supply of gas from the first end of the connector to the second end of the connector.

18. The flow generator of claim 17, wherein said another component of the CPAP device is a humidifier.

19. The flow generator of claim 17, wherein the flexible sealing portion of the connector is configured to abut an upright sidewall defining an inlet of a humidifier.

20. The flow generator of claim 17, further comprising a chamber provided with sound insulating materials, the chamber being in communication with the motorized fan outlet and the flow generator outlet and being positioned downstream of the motorized fan outlet, wherein a lower portion of the chamber is positioned below both the flow generator outlet and the motorized fan outlet when the flow generator is in an upright orientation.

21. The flow generator of claim 17, wherein the connector is offset from the motorized fan outlet.

22. The flow generator of claim 17, wherein the connector is comprised of silicone or silicone-like material.

23. The flow generator of claim 17, wherein the connector has a one-piece construction.

24. The flow generator of claim 17, wherein the connector is removably attached to the flow generator.

25. The flow generator of claim 17, wherein the attaching portion is cylindrical.

26. The flow generator of claim 17, wherein the bellows-type conforming face seal has a gradually curved cross-section profile.

27. The flow generator of claim 17, further comprising a chamber provided with sound insulating materials, the chamber being in communication with the motorized fan outlet and the flow generator outlet and being positioned downstream of the motorized fan outlet,

wherein a lower portion of the chamber is positioned below both the flow generator outlet and the motorized fan outlet when the flow generator is in an upright orientation,

wherein said another component of the CPAP device is a humidifier and the flexible sealing portion of the connector is configured to abut an upright sidewall defining an inlet of the humidifier,

wherein the connector is offset from the motorized fan outlet,

wherein the connector is comprised of silicone or silicone-like material,

wherein the connector has a one-piece construction,

wherein the connector is removably attached to the flow generator

wherein the attaching portion is cylindrical, and

wherein the bellows-type conforming face seal has a gradually curved cross-section profile.

28. The flow generator of claim 17, wherein the flexible sealing portion is configured to form a seal with a surface of said another component of the CPAP device by moving the entirety of the connector toward the surface or moving the surface toward the flexible sealing portion, and wherein the surface of said another component of the CPAP device remains outside of the channel.

29. A CPAP device comprising:

a flow generator according to claim 17; and

a humidifier positioned to receive the pressurized supply of gas from the flow generator.

30. The CPAP device of claim 29, wherein

the connector provides a flow path between the flow generator outlet and an inlet of the humidifier.

31. The CPAP device of claim 30, wherein an aperture in the bellows-type conforming face seal has a larger diameter than the humidifier inlet to accommodate tolerances and/or misalignment between the flow generator and the humidifier.

32. The CPAP device of claim 30, wherein the bellows-type conforming face seal is configured to abut a surface of the humidifier surrounding the humidifier inlet.

33. The CPAP device of claim 30, wherein the connector provides a flow path between the flow generator outlet and an inlet of the humidifier,

wherein an aperture in the bellows-type conforming face seal has a larger diameter than the humidifier inlet to accommodate tolerances and/or misalignment between the flow generator and the humidifier, and

wherein the bellows-type conforming face seal is configured to abut a surface of the humidifier surrounding the humidifier inlet.